The answer is c. if you plug in the numbers for x you get the correct numbers for y
94 - 30/6 * 1194-5 * 1194 - 5539
The 5x and the combination of (40° + x) are "vertical angles".
Vertical angles are equal.
So
5x = 40° + x
Subtract 'x' from each side: 4x = 40°
Divide each side by 4 : x = ?
412/84 = 4 R 76 <- you will have a remainder